在 CentOS6 上安装 memcached

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1. 安装 libevent

# yum list|grep libevent*

libevent.x86_64                        1.4.13-4.el6                     
libevent.i686                          1.4.13-4.el6                      
libevent-devel.i686                    1.4.13-4.el6                         
libevent-devel.x86_64                  1.4.13-4.el6                        
libevent-doc.noarch                    1.4.13-4.el6                        
libevent-headers.noarch                1.4.13-4.el6                     

# yum install libevent.x86_64 libevent-devel.x86_64

2. 安装 memcached

# wget http://memcached.googlecode.com/files/memcached-1.4.15.tar.gz
# tar zxvf memcached-1.4.15.tar.gz
# cd memcached-1.4.15
# ./configure
# make
# make install

3. 使用 memcached

参数

-p 监听端口
-l 连接的IP地址,默认是本机
-d start 启动 memecached 服务
-d restart 重启
-d stop|shutdown关闭服务
-d install 安装
-d uninstall 卸载
-u 以身份运行仅在 root 下有效
-m 最大内存使用，单位 MB，默认 64MB
-M 内存耗尽时返回错误
-c 最大同时连接数量,默认是 1024
-f 块大小增长因为,默认是 1.25
-n 最小分配空间, key + value + flags 默认48
-h 显示帮助

启动

# memcached -d -u root

验证

＃ telnet localhost 11211
Trying ::1...
Connected to localhost.
Escape character is '^]'.

查看当前状态

＃ stats
TAT pid 26427
STAT uptime 2137
STAT time 1346995532
STAT version 1.4.15
STAT libevent 1.4.13-stable
STAT pointer_size 64
STAT rusage_user 0.012998
STAT rusage_system 0.023996
STAT curr_connections 10
STAT total_connections 14
STAT connection_structures 12
STAT reserved_fds 20
STAT cmd_get 0
STAT cmd_set 0
STAT cmd_flush 0
STAT cmd_touch 0
STAT get_hits 0
STAT get_misses 0
STAT delete_misses 0
STAT delete_hits 0
STAT incr_misses 0
STAT incr_hits 0
STAT decr_misses 0
STAT decr_hits 0
STAT cas_misses 0
STAT cas_hits 0
STAT cas_badval 0
STAT touch_hits 0
STAT touch_misses 0
STAT auth_cmds 0
STAT auth_errors 0
STAT bytes_read 68
STAT bytes_written 2091
STAT limit_maxbytes 67108864
STAT accepting_conns 1
STAT listen_disabled_num 0
STAT threads 4
STAT conn_yields 0
STAT hash_power_level 16
STAT hash_bytes 524288
STAT hash_is_expanding 0
STAT bytes 0
STAT curr_items 0
STAT total_items 0
STAT expired_unfetched 0
STAT evicted_unfetched 0
STAT evictions 0
STAT reclaimed 0
END

远程使用需要打开 iptables 端口

# vim /etc/sysconfig/iptables
----
-A INPUT -m state --state NEW -m tcp -p tcp --dport 11211 -j ACCEPT
-A INPUT -m state --state NEW -m udp -p udp --dport 11211 -j ACCEPT  

# service iptables restart